内生真菌对醉马草根际土壤线虫群落的影响

发布时间：2017-12-31 01:46

本文关键词：内生真菌对醉马草根际土壤线虫群落的影响　出处：《草业学报》2016年04期 　论文类型：期刊论文

更多相关文章： 醉马草 内生真菌 土壤线虫 多样性

【摘要】：为明确内生真菌对醉马草根际土壤线虫群落特征的影响,于2014年6,8和10月,对带内生真菌和不带内生真菌醉马草根际土壤进行采样,利用淘洗-过筛-蔗糖离心法分离线虫,根据线虫形态学特征进行鉴定,结果表明,本研究共捕获土壤线虫11889条,分别隶属于线虫动物门2纲6目22科37属,带内生真菌醉马草根际土壤线虫个体密度高于不带内生真菌醉马草,而类群数、多样性指数(H′)、均匀度指数(J)和丰富度指数(SR)均低于不带内生真菌醉马草,但处理间差异不显著,表明尽管内生真菌使醉马草根际土壤线虫个体密度有所增加,使类群数有所降低,但是内生真菌的存在对醉马草土壤线虫多样性没有影响;与不带内生真菌醉马草相比,带内生真菌醉马草根际土壤线虫MI指数显著升高,而PPI指数和PPI/MI值显著降低,表明内生真菌在一定程度上确实改变了土壤线虫功能类群组成,其中主要影响植物寄生线虫。
[Abstract]:Specific effects of Endophytic Fungi on characteristics of soil nematode communities in the rhizosphere of drunk horse, in 2014 6,8 and October, the endophytic fungi and endophytic fungi in rhizosphere soil were sampled in drunk horse, the washing - sieving - sucrose centrifugation separation of nematodes, according to morphological characteristics of nematodes were identified. The results showed that in this study, 11889 soil nematodes were captured, which belong to 2 classes, 6 animal nematodes belonging to 22 families and 37 genera, with endophytic fungi in rhizosphere soil nematodes drunk horse density is higher than that of not endophytic fungi and the number of groups, a.inebrians, diversity index (H '), evenness index (J) and the richness index (SR) were lower than those without the endophytic fungi of Achnatherum inebrians, but not significant difference among treatments, showed that although the endophytic fungi make drunk horse grass rhizosphere soil nematodes individual density increased, the number of groups decreased, the existence of drunken horse grass but soil nematode diversity of Endophytic Fungi No effect; compared with the non endophytic fungi of Achnatherum inebrians, endophytic fungi in rhizosphere soil nematode drunk horse MI index was significantly increased, while the PPI index and PPI/MI value decreased significantly, showed that endophytic fungi in a certain extent changed the composition of functional groups of soil nematodes, which mainly affects plant parasitic nematodes.

【作者单位】：兰州大学草地农业科技学院草地农业生态系统国家重点实验室;
【基金】：国家重点基础研究发展计划(973项目)课题(2014CB138702) 长江学者和创新团队发展计划(IRT13019)资助
【分类号】：S812
【正文快照】： 醉马草(Achnatherum inebrians)为禾本科、芨芨草属的多年生植物,是我国北方草原主要的烈性毒草之一,广泛分布在我国甘肃、新疆、内蒙古、青海等省区[1]。禾草-内生真菌是寄生在禾草中、渡过全部或大部分生命周期、而禾草不表现任何症状的一大类真菌[2]。调查研究发现,上述省

【相似文献】